[FieldTrip] [problem] zero plv

[Shen-Mou Hsu]

Dear JM,

After correcting the typo you pointed out, I do get the plv. Many thanks
indeed!

Shen-Mou

On Thu, Apr 12, 2012 at 6:15 PM, Shen-Mou Hsu <explena at gmail.com> wrote:

> Hi JM,
>
> Apologize for such a stupid mistake. However, I have amended the typo and
> the results are the same.  Both cumsumcnt and cumtapcnt returned constant
> values, 1101 (timepoints) and 3, respectively. I am indebted to your
> kindness in this matter.
>
> Shen-Mou
>
>
> On Thu, Apr 12, 2012 at 5:37 PM, jan-mathijs schoffelen <
> jan.schoffelen at donders.ru.nl> wrote:
>
>> Hi Shen-Mou,
>>
>> There's a typo in the cfg that you supply to ft_freqanalysis -> cfg.ouput
>> should read cfg.output
>>
>> BW,
>>
>> JM
>>
>>   On Apr 12, 2012, at 10:57 AM, Shen-Mou Hsu wrote:
>>
>>  Dear Users,
>>
>> I try to calculate the phase locking values following the tutorial and
>> encounter a problem.
>>
>> First, I ran freqanalysis as follows:
>>         cfg                         = [];
>>         cfg.channel                 = 'EEG';
>>         cfg.method                  = 'mtmfft';
>>         cfg.foi                     = 8:1:120;
>>         cfg.keeptrials              = 'yes';
>>         cfg.ouput                   = 'fourier';
>>         cfg.tapsmofrq               = 2;
>>         Phase= ft_freqanalysis(cfg, data);
>>
>> I noticed that the values in both Phase.cumsumcnt and Phase.cumtapcnt are
>> constant values (BTW, what the meaning of cumsumcnt and cumtapcnt)
>>
>> Then, I ran connectivity analysis as follows
>>         cfg                         = [];
>>         cfg.method                  = 'plv';
>>         PLV = ft_connectivityanalysis(cfg, Phase);
>>
>> Here, I got empty matrices in both labelcmb: {0x2 cell} and plvspctrm:
>> [0x113 double]
>>
>> I wondered if there is anything wrong with the previous steps. Many
>> thanks!
>>
>> Shen-Mou Hsu
>> _______________________________________________
>> fieldtrip mailing list
>> fieldtrip at donders.ru.nl
>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>
>>
>>    Jan-Mathijs Schoffelen, MD PhD
>>
>> Donders Institute for Brain, Cognition and Behaviour,
>> Centre for Cognitive Neuroimaging,
>> Radboud University Nijmegen, The Netherlands
>>
>> Max Planck Institute for Psycholinguistics,
>> Nijmegen, The Netherlands
>>
>> J.Schoffelen at donders.ru.nl
>> Telephone: +31-24-3614793
>>
>>
>> _______________________________________________
>> fieldtrip mailing list
>> fieldtrip at donders.ru.nl
>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>
>
>
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